C Source
IltmmCapture* pCapture;
CoCreateInstance(&CLSID_ltmmCapture, NULL, CLSCTX_INPROC_SERVER,&IID_IltmmCapture,(void**) &pCapture);
C++ Source
IltmmCapture* pCapture;
CoCreateInstance(&CLSID_ltmmCapture, NULL, CLSCTX_INPROC_SERVER,&IID_IltmmCapture, (void**) &pCapture);
C Source
HWND hwndNotify;
#define WM_CAPTURENOTIFY (WM_USER + 1000)
IltmmCapture_SetNotifyWindow(pCapture, (long) hwndNotify, WM_CAPTURENOTIFY);
C++ Source
HWND hwndNotify;
#define WM_CAPTURENOTIFY (WM_USER + 1000)
pCapture->SetNotifyWindow((long) hwndNotify, WM_CAPTURENOTIFY);
The above code instructs the capture object to send WM_CAPTURENOTIFY messages to the window procedure of hwndNotify. The wParam parameter of the window message will contain the notification code.
Note: A capture can be accomplished without using a notification window, but the user would be required to poll the objects state to determine when the capture has finished.
3.Define a frame window for the video preview:
C Source
HWND hwndFrame;
IltmmCapture_put_VideoWindowFrame(pCapture, (long) hwndFrame);
C++ Source
HWND hwndFrame;
pCapture->put_VideoWindowFrame((long) hwndFrame);
The user is required to create the window that serves as the video frame. ltmmCapture will subclass this window, so there is no need to forward any messages to the ltmmCapture object. By default, ltmmCapture will automatically maximize the video within the frame window. The video will automatically resize when the frame window size changes.
Note: The notification window and the video frame window can be the same.
C Source
BSTR bstr;
bstr = SysAllocString(L"c:\\captured.asf");
IltmmCapture_put_TargetFile(pCapture, bstr);
SysFreeString(bstr);
C++ Source
BSTR bstr;
::SysAllocString(L"c:\\captured.asf");
pCapture->put_TargetFile(bstr);
::SysFreeString(bstr);
C Source
IltmmDevices* devices;
IltmmCapture_get_VideoDevices(pCapture, &devices);
IltmmDevices_put_Selection(devices, 0);
IltmmDevices_Release(devices);
C++ Source
IltmmDevices* devices;
pCapture->get_VideoDevices(&devices);
devices->put_Selection(0);
devices->Release();
C Source
HIltmmDevices* devices;
IltmmCapture_get_AudioDevices(pCapture, &devices);
IltmmDevices_put_Selection(devices, 0);
IltmmDevices_Release(devices);
C++ Source
IltmmDevices* devices;
pCapture->get_AudioDevices(&devices);
devices->put_Selection(0);
devices->Release();
C Source
IltmmCapture_put_TargetFormat(pCapture, ltmmCapture_TargetFormat_Asf);
C++ Source
pCapture->put_TargetFormat(ltmmCapture_TargetFormat_Asf);
C Source
IltmmCapture_StartCapture(pCapture, ltmmCapture_Mode_VideoAndAudio)
C++ Source
pCapture->StartCapture(ltmmCapture_Mode_VideoAndAudio);
C Source
IltmmCapture_StopCapture(pCapture);
C++ Source
pCapture->StopCapture();
10.Release the capture object (and all active objects) when you are done.
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